Removing the drop down menu using filtering?

Just wondering whether it is possible to remove the drop down function of the menu, whilst keeping the horizontal layout.

I am trying to create a menu with two links, and no sub pages (the portfolio pages in my case) (the normal drop down bits)

Is it possible to filter those functions out? I have tried the copying and pasting the code from: http://themeshaper.com/thematic-09-released/ but to no avail! (it is in fact still in the functions.php in the child theme. The other filters appear to work fine. (side bar and comments removal along with the edited meta data)

the mentioned code will only remove the fancy stuff around the menu (keep it in your functions.php). The CSS functionality will remain. To remove the CSS dropdowns add the following code to your child theme's style.css:

Amazing, it works and was super simple! - I've been scratching my head for a while over that. Thanks for explaining it as well as giving the code, always useful to know what it's doing. I had assumed the drop downs were part of the thematic code rather than CSS and was looking in the wrong place!

Andy .. Sorry .. you can argue that keeping the sub-menus hidden might not be the best solution. That's fine. But the hidden text is not unrelated to the website and therefore this is definitely not spamdexing!